China’s factory activity unexpectedly slipped into contraction for the first time in five months, and construction activity fell to its lowest since the pandemic, underscoring a divide in the nation’s economy that complicates efforts to revive growth. The official manufacturing purchasing managers’ index (PMI) dropped to 49.2 in July, missing the 50.1 median estimate in a Bloomberg poll of economists. Construction and services, part of non-manufacturing PMI, tumbled to 49 from 50.2 a month...